# How to replace the whole response with a content coming from a different URL

**URL:** <https://discourse.mitmproxy.org/t/how-to-replace-the-whole-response-with-a-content-coming-from-a-different-url/617>\
**Category:** help\
**Created:** [September 1, 2017, 6:18pm UTC](https://discourse.mitmproxy.org/t/how-to-replace-the-whole-response-with-a-content-coming-from-a-different-url/617 "2017-09-01T18:18:56Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![luca](https://avatars.discourse-cdn.com/v4/letter/l/51bf81/32.png) [@luca](https://discourse.mitmproxy.org/u/luca)\
**Post date:** [September 1, 2017, 6:18pm UTC](https://discourse.mitmproxy.org/t/how-to-replace-the-whole-response-with-a-content-coming-from-a-different-url/617/1 "2017-09-01T18:18:56Z")

</div>

I am new to mitmproxy and to python, sorry in advance for any inaccuracy.

I am trying to replace the whole response with a new one coming from a different url on certain conditions.  
Simplifying things, if the request contains mydomain/some/thing I want to show the original response,  
but if the request contains mydomain/replace/me I want to replace the response with the content  
coming from mydomain.local/replace/me  
Only the response content needs to change, not the requested url.

I tried a small script

> import requests  
> url = “example”  
> r = requests.get(url)  
> print(r.text)

and it works fine if I type

> phyton myscript

However if I try to change a little bit the script to be used in mitmproxy as a myrules script file

> import requests  
> from mitmproxy import ctx, http

> def request(flow):  
> if “mydomain” in flow.request.host:  
> ctx.log.info(“Found”)  
> url = “example”  
> r = requests.get(url)  
> ctx.log.info(r.text)

and launch mitmproxy with:

> mitmproxy -s myrules

mitmproxy shows my traffic, however as soon as I type mydomain in the browser it get stuck

What am I doing wrong?  
Thanks in advance!

$ mitmproxy --version  
Mitmproxy version: 2.0.2 (release version)  
Python version: 3.6.2  
Platform: Darwin-15.6.0-x86\_64-i386-64bit  
SSL version: OpenSSL 1.1.0f 25 May 2017  
Mac version: 10.11.6 (‘’, ‘’, ‘’) x86\_64

$ python3 --version  
Python 3.6.2

$ pip3 --version  
pip 9.0.1 from /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (python 3.6)